Vehicle Body Frame Upper Frame Design for Battery Installation Space
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Solution Overview
Problem
Existing vehicle battery installation structures have limited degrees of freedom in setting space due to narrow intervals between the floor and battery pan, restricting the installation of batteries and similar objects.
Innovation Solution
A vehicle body frame with side frames and an upper frame that extends in a longitudinal direction, where the upper frame is positioned closer to the vehicle's transverse direction inner side and lower than the side frames, allowing for increased installation space and forming a closed cross-sectional structure to absorb collision loads efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interval between the floor portion and battery pan is made narrow to protect the battery from submersion, then battery protection is improved, but the degrees of freedom in setting space for installation of the battery decrease
Solution Approach 1:
The patent transitions from a conventional flat battery pan design to a three-dimensional box-shaped battery pan with vertical walls. This dimensional change allows the battery to be positioned lower in the vehicle body, creating sufficient clearance between the battery top surface and the floor panel while maintaining protection from submersion. The vertical dimension provides the necessary space for battery installation without compromising safety.
2Adaptability or versatility
If the upper frame is positioned higher to increase installation space, then setting space flexibility is improved, but collision load absorption capability deteriorates
Solution Approach 1:
The upper frame is designed as a three-dimensional box structure with vertical walls extending downward from the floor panel. This dimensional design allows the frame to achieve sufficient height for installing various battery sizes while maintaining a low overall position that ensures effective collision load absorption during side impacts.
Solution Approach 2:
The upper frame is constructed as a closed cross-sectional structure that combines structural strength with space efficiency. This composite design provides both the necessary height for installation flexibility and the structural integrity for collision protection.
3Strength
If the side frames are made taller to increase protection height, then collision protection is improved, but the interval for battery installation decreases
Solution Approach 1:
The side frames are designed as box-shaped structures with vertical walls that extend upward from the lower frame. This dimensional design provides sufficient vertical protection height while maintaining adequate horizontal and vertical clearance for battery installation within the enclosed space.
Data Source
AI summary
A vehicle body frame includes: side frames that have at least inner walls that are disposed at vehicle transverse direction inner sides and upper walls that are disposed at vehicle body vertical direction upper sides, and that are formed as closed cross-sectional structures, and that extend in a vehicle body longitudinal direction, and that are fastened and fixed to under members that are disposed at a vehicle body lower side of a floor panel; and an upper frame that is disposed further toward a vehicle transverse direction inner side than the inner walls and at a height that is lower than the upper walls, and at which an installed object is installed.